Unit 152 (1) Eng Mech / Lub / Cooling

On a compression ignition engine at what point will fuel be injected into the cylinder?

• End of compression stroke.

• End of induction stroke.

• End of power stroke.

• End of exhaust stroke.

In the compression ignition engine four stroke cycle, which stroke is not an idle stroke?

• Exhaust stroke.

• Power stroke.

• Induction stroke.

• Compression stroke.

Which component causes the inlet and exhaust valves to open?

• The valve spring.

• The cam follower.

• The camshaft.

• The push rod.

Which component in the engine lubrication system incorporates a bypass valve?

• The engine oil pump.

• The oil pump strainer.

• The oil scavenge pump

• The engine oil filter.

At what position in the lubrication system is an oil pressure relief valve fitted?

• Before the oil pump.

• After the oil pump.

• Before the oil strainer.

• After the oil filter.

Which component controls the operating pressure in a sealed cooling system?

• The vacuum valve.

• The expansion tank filler cap.

• The water pump.

• The thermostat.

Which component in a vehicle cooling system can be driven from the camshaft drive belt?

• A variable pitch cooling fan.

• A viscous cooling fan.

• The water pump.

• The transfer pump.

If the heater is only blowing cold air, which cooling system component could be at fault?

• Thermostat.

• Water pump.

• Radiator.

• Cooling fan.

If the heater motor will not operate, what component should be checked first?

• Thermostat.

• Heater switch.

• In-line fuse.

• Ignition switch.

If the pressure cap is found to be faulty and not holding its stated pressure, what effect would this have on the coolant boiling point?

• The coolant would boil at 100 degrees C.

• The coolant would boil at less than 100 degrees C.

• The coolant would boil above 100 degrees C.

• The coolant would operate at normal running temperature.